DLR, ESA / SCIENCE PHOTO LIBRARY DLR, ESA / SCIENCE PHOTO LIBRARY
Global ocean surface topography. Map of the world, showing the topography of the ocean surface. The colours in the image represent the variation in mean sea height; from purple (higher) through red, orange, yellow (no variation), and green to blue (lower). These data are laid over a topographic map of the globe, with ocean floor features shown in shaded relief. Land masses are shown in grey. Variations from mean global sea surface may be caused by extremes of mean atmospheric pressure and local variations in the Earth's gravity field. The data for this image were gathered by the European ERS-1 radar mapping satellite.
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